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There are various ways to achieve what you are talking about within Wordpress.

1) Multisite/Network. For each City (or whatever your top level is), you create a new site with a default theme. This allows for either www.website.com/paris/music or paris.website.com/music, depending on your requirements.

2) Write Plugin to automate item creation You could wrap the category creation and subcategory assignment on a single site, as well as menu creation, into a plugin. From plugin admin you enter new top level categories, and have it do the rest.

Hey thanks for your answer. So if I'm using multisite structure, I will pay the hosting for each subfolders (cities) that I will create right? About the Custom Post Types, You suggest to create 1 Custom Post Type for Each City and add inside Each Custom Taxonomies (which here will be the same for every city)?
– majningmasterMay 12 '17 at 22:13

As far as hosting a multisite/network, it is run from a single wordpress core install. You do need some extra things, like dedicated ip and ability to setup wildcard dns if you're going to do subdomains. I do not recommend a shared hosting plan for it. On the other...
– hwlMay 12 '17 at 22:23

All right, so I'm creating let's say a Network/Multisite and installing WP on "website.com", then I create "website.com/paris" and "website.com/london" as a subfolders and host them. So in this Case I Will pay more for the hosting than using a SingleSite? Could you clarify me also If I'm right concerning Custom Post Types? Thanks again.
– majningmasterMay 12 '17 at 22:30

Taxonomies can be shared across post types. So you can have a music Taxonomy and assign it to the Paris CPT and to the Berlin CPT. Or have a cities CPT with entries of Paris, Berlin, etc., and a music CPT and tie them together relationally through a shared taxonomy (say City Name with values of each CPT post. On the last one, a city post named Berlin and a Music post about Berlin could both have Berlin taxonomy. The organizational structure depends on what you wish to achieve.
– hwlMay 12 '17 at 22:30

You create Network install on Website.com. You choose subdirectory install. From within WP Network Admin, you create a new site named "Paris". This will exist at Website.com/Paris. It will add a site_id layer to the database. All manageable through one install, and possible to have separate admins for each, with a Super Admin user over the Network.
– hwlMay 12 '17 at 22:35